About Calculator Heaven
Calculator Heaven is a free collection of converters and calculators for everyday life: the kitchen, the gym, homework, DIY and everything in between. The aim is simple. You type a number, you get the answer, and you can see exactly how we got there.
Where our numbers come from: unit conversions use the internationally agreed definitions, such as 2.54 centimeters to the inch and 0.45359237 kilograms to the pound, so they are exact. Ingredient weights are typical values for US cup measures with dry goods spooned and leveled. Health calculators use published, widely adopted formulas, and each page names the one it uses.
Checking our work: every calculator is tested against worked examples before it goes live, and each page shows when it was last reviewed. Spotted something that looks off? We would much rather know.
A word on health tools: BMI, body fat, calorie and pregnancy calculators give general estimates based on averages. They are not medical advice and cannot account for your personal circumstances. Please speak to a doctor, midwife or dietitian about anything that concerns you.
Your privacy: the sums happen in your browser. Whatever you type into a calculator stays on your device and is not sent to us or saved. We do use Google Analytics to see how many people visit and which tools are popular, but it only records the pages viewed, never the numbers you enter.
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